We are using cookies to implement functions like login, shopping cart or language selection for this website. Furthermore we use Google Analytics to create anonymized statistical reports of the usage which creates Cookies too. You will find more information in our privacy policy.
OK, I agree I do not want Google Analytics-Cookies
Chinese Journal of Dental Research
Chin J Dent Res 10 (2007), No. 2     14. Dec. 2007
Chin J Dent Res 10 (2007), No. 2  (14.12.2007)

Page 49-56


Long-term Stability of Combined Orthodontic-surgical Treatment of Skeletal Open Bite: A Retrospective Study
Ding, Yun / Gellrich, Nils-Claudius / Schwestka-Polly, Rainer / Wiechmann, Dirk
Objective: To study long-term skeletal and dento-alveolar stability 15 years after surgical-orthodontic correction of skeletal open bite.
Methods: Ten open bite patients (8 females and 2 males) who had undergone orthodontic treatment in combination with bimaxillary surgery at Hannover Medical School were reviewed. All patients underwent Le Fort I osteotomies combined with bilateral sagittal split osteotomy. The cephalometric records of these patients were examined at the start of orthodontic treatment (T1), before surgery (T2), immediately after surgery (T3), medium-term after surgery (average 1.5 years, T4) and long-term after surgery (average 15 years, T5). Eight skeletal and five dental cephalometric measurements were selected. Skeletal and dento-alveolar changes were evaluated.
Results: Moderate skeletal relapse has been observed 15 years after surgery in skeletal open bite patients treated by bimaxillary surgery. Approximately half of the total surgical changes in PP-SN, MP-SN and ANS-Me remained. Two-thirds of surgical changes in N-Me, N-ANS and S-Go remained. Except that the anterior part of maxilla relapsed completely 1.5 years after surgery, other skeletal relapses occurred mainly in the late follow-up period. Overbite remained quite stable 15 years after surgery, which was mainly due to the upper and lower incisors eruption during the long-term period.
Conclusion: Treatment of skeletal open bite via Le Fort I and bilateral sagittal split osteotomies appears to be a clinically successful and stable procedure.